Checks
| Action
|
Definition: A steady
or jerking that follows the engine speed, usually more pronounced as the
engine load increases which is not normally felt above 1500 RPM or
48 km/h (30 mph). The exhaust has a steady spitting sound during
idle, low speed, or hard acceleration due to the fuel starvation that can
cause the engine to cut-out.
|
Preliminary Check
| Refer to Symptoms
.
|
Ignition System
Checks
| Check for a cylinder misfire:
- Start the engine.
- Allow the engine to stabilize.
- Perform the injector balance test. Refer to Injection Nozzle(s) Diagnosis
.
- If there is no RPM drop on one or more of the cylinders, or if
there is an excessive variation in drop, refer to Engine Mechanical.
|
Engine Mechanical Checks
|
| • | Check the engine for the following: |
| - | Broken or weak valve springs |
| • | Check the intake and exhaust manifold passages for a casting flash. |
|
Fuel System Checks
|
| • | Check the fuel system for a plugged fuel filter, low fuel pressure,
etc. Refer to Fuel Supply System Check
. |
| • | Check for water contamination in the fuel. Refer to Contamination Testing
. |
|
